Dr. Moges Tsega Yihune

photo: 

Dr. Moges Tsega Yihune

Address:   Physics department

     Bahir Dar University

   Phone: +251984264401

   Bahir Dar, Ethiopia

  E-mail : mogestsega@yahoo.com

EDUCATION

PhD in Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan, June 2013.

  • MSc in Solid State Physics, Addis Ababa University, Ethiopia, July 2005.
  • BED in Physics, Bahir Dar University, Ethiopia, July 2000.
  • Diploma in Physics, Bahir Dar Teachers’ College, Ethiopia, July 1995.

EMPLOYMENT

  • Associate Professor, Bahir Dar University, Ethiopia: July 2018-present.
  • Assistant Professor, Bahir Dar University, Ethiopia: Sep. 2016-June 2018.
  • Postdoctoral research fellow, University of the Free State, South Africa: Sep. 2014-Sep. 2016.
  • Assistant Professor, Bahir Dar University, Ethiopia: Aug. 2013- Sep. 2014.
  • Lecturer, Bahir Dar University, Ethiopia: Sep. 2005-Aug. 2010.
  • Graduate assistant, Mekelle University, Ethiopia: Sep. 2002-Aug. 2003
  • Diploma, Teaching Physics in high school, Ethiopia: Aug. 1995-Aug. 1997.

SCIENTIFIC PUBLICATIONS

Peer-Reviewed Journals

  1. Megersa K. Hussen, Francis B. Dejene, Moges Tsega, Efect of pH on material properties of ZnAl2O4:Cr3+ nano particles prepared by sol–gel method, Journal of Materials Science: Materials in Electronics, 30 (2019) 10191–10201.
  2. Moges Tsega, Francis Brihanu Dejene, “Morphological, thermal and optical properties of TiO2 nanoparticles: The effect of titania precursor”, Mater. Res. Express 6 (2019) 065041.
  3. Moges Tsega, Francis Brihanu Dejene, “Photoluminescence and Thermoluminescence Properties of Sol-Gel Auto-Combustion Driven Mg2SnO4 Nanophosphor”, ECS Journal of Solid State Science and Technology, 7 (11) R183-R189 (2018)
  4. Moges Tsega, Francis Brihanu Dejene, and Dong-Hau Kuo, “Defect Related Green-Red Luminescence of Sb-Doped ZnO Nanorods Grown by Vapor-Phase Oxidation Method”, J. Nanosci. Nanotechnol. 18, 5785–5789 (2018).
  5. Moges Tsega and  F.B. Dejene, “Synthesis and luminescence properties of bluish-yellow emitting CaSnO3:Eu3+ phosphor”, Bull. Mater. Sci., Vol. 40, No. 7, December 2017, pp. 1347–1354.
  6. Moges Tsega, F.B. Dejene, “Tailoring luminescence properties of a sol-gel drivenTiO2 nanoparticles by ammonia treatment ”; Materials research express 4 (2017) 035018.
  7. Moges Tsega, F.B. Dejene, “Influence of acidic pH on the formulation of TiO2 nanocrystalline powders with enhanced photoluminescence property”; Heliyon 3 (2017) e00246.
  8. F. B. Dejene, Moges Tsega, “Blue-red emitting BaAlxOy:Eu2+,Dy3+nanophosphors synthesized using solution-combustion method: The effect of boric acid”;  International Journal for Light and Electron Optics 127 (2016) 1975-1979.
  9. S.V. Motloung, M. Tsega, F.B. Dejene, H. C. Swart,  “Effect of annealing temperature on structural and optical properties of ZnAl2O4:1.5% Pb2+ nanocrystals synthesized via sol-gel reaction”; Journal of Alloys and Compounds 677 (2016) 72−79.
  10. Moges Tsega, F.B. Dejene, “Structural and Optical Properties of Ce-Doped TiO2 Nanoparticles Using the Sol-Gel Process”, ECS Journal of Solid State Science and Technology, 5 (2) (2016) R17-R20.
  11. L.F. Koao, F.B. Dejene, Moges Tsega, H.C. Swart,  “Annealed Ce3+-doped ZnO flower-like morphology synthesized by chemical bath deposition method”, Physica B: Condensed Matter, 480 (2016) 53–57.
  12. F.B. Dejene, M.O. Onani, L.F. Koao, A.H. Wako, S.V. Motloung, M.T. Yihunie “Structure, morphology and optical properties of undoped and Mn-doped ZnO(1−x)Sx nano-powders prepared by precipitation method”, Physica B: Condensed Matter, 480 (2016) 63-67.
  13. Moges Tsega, F.B. Dejene, L.F. Koao, “Effects of the Copper Content on the Structural and Electrical properties of Cu2ZnSnSe4 bulks”, Physica B: Condensed Matter,  480 (2016) 84–87.
  14. Moges Tsega, Dong-Hau Kuo, F.B. Dejene “Cu2ZnSnSb(S,Se,Te)4 film formation from selenization of sputtered self-prepared single ceramic target”, Thin Solid Films 589 (2015) 712–717.
  15. Moges Tsega, F.B. Dejene, Dong-Hau Kuo, “Morphological evolution and structural properties of Cu2ZnSn(S,Se)4 thin films deposited from single ceramic target by a one-step sputtering process and selenization without H2Se”, J. Alloys Compd. 642 (2015) 140–147.
  16. M. Tsega, D-H. Kuo, F.B. Dejene, “Growth and green defect emission of ZnPbO nanorods by a catalyst-assisted thermal evaporation-oxidation method”, Journal of Crystal Growth 415 (2015) 106–110.
  17. M. Tsega and D-H. Kuo “Acceptor-Donor Transition and Electrical Property of Cu-Deficient (Cu2-xZnx)ZnSnSe4(x= 0 - 0.3) Bulks”, ECS  Solid State Sci. Lett. 3 (9) (2014) P108-P110.
  18.  D-H. Kuo and M.Tsega “Characterizations of Ga-Doped Cu1.75Zn(Sn1−xGax)Se4 Bulks”, ECS J. Solid State Sci. Technol. 3 (5) (2014) P155-P158.
  19.  D-H. Kuo and M.Tsega “Electrical conduction and mobility enhancement in p-type In-doped Cu2ZnSnSe4 bulks”, Jpn. J. Appl. Phys. 53 (2014)  03580.
  20. D-H. Kuo and M.Tsega “The investigation of CuxZnSnSe4 bulks with x = 1.4–2.2 for debating the Cu excess and Cu deficiency used in thin-film solar cells”, Mater. Res. Bull. 49 (2014) 608-613.
  21. D-H. Kuo and M.Tsega “Hole mobility enhancement of Cu-deficient Cu1.75Zn(Sn1-xAlx)Se4 bulks”, J. Solid State Chem. 206 (2013)134–138.
  22.  M. Tsega and D-H. Kuo, “Reactive sintering of Cu2ZnSnSe4 pellets at 600 oC with double sintering aids of Sb2S3 and Te”, J. Alloys Compd.  580 (2013) 217–222.
  23. M. Tsega and D-H. Kuo, “The performance of the donor and acceptor doping in the Cu-rich Cu2ZnSnSe4 bulks with different Zn/Sn ratios”, Solid State Commun. 164 (2013) 42–46.
  24. M. Tsega and D-H. Kuo, “Characterization and electrical property of the Cu-deficient Cu2ZnSn(S,Se)4 bulks at different sulfur contents”,  J. Alloys Compd.  557 (2013) 142–146.
  25. M. Tsega and D-H. Kuo,“Defects and its effects on properties of Cu-deficient Cu2ZnSnSe4 bulks with different Zn/Sn ratios”, Appl. Phys. Express 5 (2012) 091201.

Peer-Reviewed Book Chapter

·Moges Tsega :  Co-Existence of Superconductivity and Ferromagnetism in Pr Doped YBCO: The retarded double-time Green's function approach, LAP LAMBERT Academic Publishing (Dec.  2011).

Presentation at Professional Conference

  • Moges Tsega:  Photoluminescence and Thermoluminescence Properties of Sol-Gel Auto-Combustion Driven Mg2SnO4 Nanophosphor, Bahir Dar University, Science college, Ethiopia (Feb. 2019).
  • Moges Tsega: Enhanced green light of SnSe-decorated ZnO nanorods for white LED applications, Bahir Dar University, Science college, Ethiopia (Apr. 2018).
  • Moges Tsega: Synthesis and luminescence properties of bluish-yellow emitting CaSnO3:Eu3+ phosphor, Bahir Dar University, Science college, Ethiopia (Feb. 2017).
  • Moges Tsega: Effects of the Copper Content on the Structural and Electrical properties of Cu2ZnSnSe4 bulks, South African Conference on Photonic Materials, May 2015.
  • Moges Tsega: Selenization Dependence of Morphological, Structural and Electrical Properties of Cu2ZnSn(S,Se)4 Thin Films Deposited by One-Step Sputtering, South African Institute of Physics, South Africa (July 2015).
  • Moges Tsega: ZnO nanorods: harvesting Solar Energy, Institute of Energy, Bahir Dar University, Ethiopia (June 2014).
  • Moges Tsega:  Structural and electrical property of Cu2ZnSnSe4 thin-film from self-prepared ceramic target, Bahir Dar University, Ethiopia (May 2014).

TECHNICAL EXPERTISE:

  • Explored several aspects of thin film deposition systems and techniques such as DC & RF sputtering, thermal evaporation, spin coating, CVD, and sol-gel for nanparticles.
  • Acquainted with compositional, structural and optical characterization techniques such as X-ray diffraction, Raman spectroscopy, SEM, EDS, and PL.
  • Investigated electrical properties of thin films using Hall effect measurements.

FIELD OF EXPERTISE:

  • Oxide and non-oxide nanoparticles
  • Cu2ZnSn(S,Se)4 thin-film solar cells
  • Luminscence materials
  • Thin film technology
  • 1-D nanostructure                                                                                          

COURSES TAKEN

Ph. D. Program:        X-ray crystallography, Thin film technology, Advanced surface characterization, Transmission electron microscope, Electroceramics and The chemistry of surface and interface.

MSc.  Program:         Classical mechanics, Classical electrodynamics

Statistical physics, Quantum mechamics, Solid State Physics,

Computitional Physics (FORTRAN based)

SCIENTIFIC INTERSTS

  • Synthesis, structural, electrical and optical studies of CZTSe-based solar cells by vacuum and non-vacuum methods.
  • Sol-gel, CBD and combustion derived synthesis and characterization of transition metal- or lanthanide-substituted oxide luminescence materials.
  • Sintering oxide and non-oxide materials for the study of structural, electrical, optical and magnetic properties.
  • Synthesis by chemical vapor deposition (CVD) of oxide nanostructures.

COMPUTER SKILLS: Office applications, Origin, Mathematica, Mat Lab, and  FORTRAN

AWARDS RECEIVED

  • Research recognition award for scientific publications in accrediated journals, march 2014, Bahir Dar University, Ethiopia.
  • Graduate Research scholarship; Sep.  2010 – July 2013 , National Taiwan university of Science and Technology, Department of Materials Science and Engineering, Taiwan.
  • Graduate Scholarship; 2003 - 2005, Addis Ababa University, Department of Physics, Addis Ababa, Ethiopia

MEMBERSHIP AND EXTRACURRIICULAR ACTIVITIES

  • Ethiopian Physical Society,  EPS, Dec. 2006 – Present
  • Head, Testing Center, College of Science, Bahir Dar University, Ethiopia, July 2008 –  August 2010.
Academic Rank: 
Associate Professor
Contact Information: 
+251984264401